The Master of the Fist, Akuma embraced the principle of Satsui no Hadō translated to The Surge of the Intent to Murder/Murderous Intent. He is the father of Ryu, the brother of Gouken and Ken's sensei. Akuma is known as - The Raging Demon!

The prince of Hell who has the ability to force the true nature of a person to come out and also can cause people to Defecate. He really looks like a giant fly but when summoned by Akutabe he turn into a penguin with insect wings.

A necromancer who lives in the Underworld who resurrected Ayumu Aikawa as a Zombie to be her bodyguard and a constant companion. Due to her immense amount of mana she is unable to speak. She communicates with either a simple smile or by writing her thoughts and ideas.

Hild is the leader of Hell (Daimakaicho) and the mother of Urd. She refers to herself as "we / us" when on business, but will speak of herself singularly when talking personally. She wants the goddesses to leave Earth so Hell can take over. She loves Urd deeply.